Bump pympipool from 0.7.2 to 0.7.3

Bumps [pympipool](https://github.com/jan-janssen/pympipool) from 0.7.2 to 0.7.3.
- [Release notes](https://github.com/jan-janssen/pympipool/releases)
- [Commits](https://github.com/jan-janssen/pympipool/compare/pympipool-0.7.2...pympipool-0.7.3)

---
updated-dependencies:
- dependency-name: pympipool
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

setup.py

@@ -27,7 +27,7 @@
     keywords='lammps, mpi4py',
     packages=find_packages(exclude=["*tests*"]),
     install_requires=[
-        "mpi4py==3.1.5", "pympipool==0.7.2", "numpy==1.26.0"
+        "mpi4py==3.1.5", "pympipool==0.7.3", "numpy==1.26.0"
     ],
     extras_require={
         "ase": ["ase==3.22.1", "scipy==1.11.3"],